Shaft-coupling.



No. 630,5l4. Patented Aug. 8, I899. E. MULLER.

SHAFT COUPLING. (Application filed June 22, 1897.)

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(No Model.)

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.. wnsumn'rou u c No. 630,5!4. Patented Aug. 8, I899. E. MULLER.

SHAFT COUPLING.

(Application filed June 22, 1897.) (No Model.) 3 Shoots-Sheet 2,

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(Application filed June 22, 1897.) (No Model.) v 3 Sheets-Sheet 3.

UNITED. STATESi PATENT @FFIGEE.

EMANUELMULLER, OF LEIPSIO, GERMANY, ASSIGNOR TO HEINRICH HIRZEL,

- OF SAME PLACE.

SHAFT-COUPLING.

- SPECIFICATION fo ls; part of Letters Patent Nb. 630, 14, dated August 8, 1899.

Application filed June 22, 1897. Serial No. 641,842. (No model.)

To aZZ whom it may concern.-

Be it known thatl; EMANUEL MULLER, a citizen of Switzerland; residing at Leipsic- Plagwitz, Kingdom of Saxony, German'y,have invented a new and usefulImproveinent in Shaft-Couplings, of which the following is a full and exact specification.

My invention relates to improvements in couplings for shafts and the'like.

The object of my invention is to provide a coupling which in proportion to the diameter of the shaft for which it'is'tobe used will be much smaller than those couplings hitherto known to me, will have no projecting parts liable to cause accidents during therotation of the shaftb'ycatchingin'the'garrnents of workmen, and which will securely couple the shafts to which it is applied, while at the same time readily permitting the uncoupling of said shafts.

With these objects in view my invention consists in the features, details of construe-- tion, and combination of parts which will first be described in connection with the accompanying drawings and then particularly pointed out in the claims. j

In the drawings, Figure'l is an elevation oftwo shaft ends prepared in accordance with my invention and forming part of the coupg ling device, said shaft ends beingshown apart with a key device d between them. 'Fig. 2 is a view showing the two shaft ends in contact with the key in -pl'ace andwith a coupling ring and a holding-ring in place, the 'latter: rings being in section. Fig. 3 is a view simi-' lar to Fig. 2, the whole coupling beingas'sumed to be rotated in its axis ninety -degrees from the position shown in Fig. 2, a part of each shaft end being in section to show the key in place, the holding-ring also being in section. Fig. t is a transverse section through the shaft end a, showing one part of the couplingring removed, the other part in place, and the holding-ring'in its normal position. Figs. 5 to 8 are views similar to Figs. 1 to 4:, respectively, and illustrate another form of coupling embodying myinvention. Fig. 9 is a sectional view of another form of coupling embodying my invention; Fig. 10, a transverse section of the same through one of the shaft ends, showing one part ofthe couplingring removedgi-Fig. 11, an elevation of the same; Fig, 12, an elevation, partly in section, of theisaid'lnodification, one-half of each holding-ring bei'ng emoved. Fig. 13 is an en larged detail sectional view of the modification shown in Figs. 9 to 12.

Referring to the drawings, and particularly to the constructions shown in Figs. 1 to 4:, inclusive, a and b are two shafts to be coupled. Each shaft end is provided with a flange c (1', respectively, one of the ends also being provided with a circular recess or shallow socket, as indicated by the dotted lines at e in Fig. 1,' whileithelother'endis provided with a. corresponding projection; f, arranged to enter the socket e andto fit the same exactly, so that the end faces of the shafts a and b will come into close contact when the projection f is in its socket e. Each shaft end is provided with a diametrically-arranged groove, as'indicated at git, these grooves being in the nature of key-seats arranged to receive a key 45, as will be clear from Figs. 2 and 3. The 'two flanges 'c (1 when the shaft ends are in i 5 close contact are encircled by a coupling-ring formed of segmental sections in Z, said coupiling ring having an interior rabbet of such ls'ize as to receive the outer parts of the two lflanges' cfcl, as shown in Fig. 2. The periphcry of the said coupling-rin g is made tapering or conical in order that 'a'holding-ring m, havinga correspondingly-conedinterior surface, may be driven tightly onto said coupling-ring formed by the segments is Z, thereby Icompressing the said segments and binding 2 the flanges o d, so as to hold the two end surfaces of the shafts in close contact with each other, the inner surface of the coupling-rings being also in close contact with the said flanges. In order to uncouple the device, the holdingring on is driven off, which may readily be done with a few blows of a hammer, thus permitting the segments kl of theconpling-ring to be removed from the flanges c d", after which the key 71 may be driven out, thus freeing the two shaft ends and permitting motion of one shaft with relation to the other shaft,

if this be desired.

In Figs. 5 to 8, inclusive, I have shown another form of coupling embodying my invention. In this said form the shaft ends a 0 instead of being provided with diametrical grooves or key-seats have notches, as shown at g 7L2, Fig. 5, these notches being arranged to be brought into register with each other, whereupon a key F, in the nature of a block, may be inserted into the registering notches. In the construction shown in Figs. 5 to 8, inclusive, four of these key-blocks i are employed; but it is obvious that more or less may be used, as circumstances require. This second construction also differs from that shown in Figs. 1 to 4, inclusive, in that the holdiug-ringm is held against slipping off the coupling-ring t by means of retainingrings N each of which is provided with a radial portion 11 having a circumferential flange 0 entering'a corresponding recess in the respective side of the coupling-rim g, and with a circumferential portion 17 having its free edge provided with an annular recess, as indicated at q*, which receives the corresponding edge of the holding-ring m The retaining-rings N are held to the couplingring by screws W, as indicated in Fig. 8. In this construction to uncouple the shafts the screws 0' are removed and the retainin g-rin gs N 2 taken off, after which the holding-ring m may be driven off and the segments k l of the coupling-ring released and removed. Then the key-blocks' i may be loosened and taken out, whereupon the two shafts are free to move relative to each other.

In Figs. 9 to 13, inclusive, another form of device embodying my invention is illustrated, this form differing from those previously described in that one shaft end has a deep socket, as shown at 8 while the other shaft end has its projection f enlarged to fit into the said deep socket. Moreover, the periphery of the shaft end which has the socket is provided with two conical surfaces engaged by two holding-rings m as will be clear from Fig. 13, which rings when driven up tightly from opposite directions cause the socketed shaft end to be compressed, thus firmly contacting with the projection f of the other shaft end. The holding-rings m are each held in place by a single retaining-ring N held in place by screws 0*. In this construction the key devices f (of which four are employed) are located in longitudinal key slots or grooves cut radially through the bell portion of the socketed shaft end, as indicated at 7L3, and extending into the enlarged projection of the other shaft end, as shown at 9 The keys are each provided on their inner faces with holes, into each of which enters the end of a stud s, the other ends of the respective studs fitting into corresponding holes in the socketed shaft end. In this con struction the end surfaces of the two shafts a b are separated by a slight interval, whereby a small amount of longitudinal movement of the shafts relative to each other is permitted to allow the shafts to accent modate themselves to temperature changes. The keys 2' also permit this longitudinal move ment of the shafts with relation to each other, while at the same time compelling them to retate in unison. To uncouple this device, the screws 1' are taken out and the retaining-rings N moved along the respective shafts away from the holding-rings m which may then be driven off in opposite directions, thus freeings the keys 2' which can be lifted out of their respective seats, the studs 8 being also capable of removal, if desired, since they are held in the holes in the shaft end by friction only. In this condition the shafts may rotate separately, if desired.

It will be seen that by my construction the coupling is comparatively small, that pulleys may be mounted on the shafts close to the shaft ends, and that owing to the great amount of frictional surface in contact the key devices are relieved from a part of the strain due to transmission of power from one shaft to the other.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a shaft-coupling, the combination with two shafts placed end to end, said ends being enlarged and provided with frictional surfaces in contact with each other, each end also having a recess, the said recesses being in register with each other, of a key arranged partly in each recess, and a ring arranged to hold the key in place and to press the frictional surfaces of the shaft ends in close con tact with each other.

2. In a shaft -coupling, the combination with two shafts placed end to end, one shaft having its end provided with a socket and the other with a projection arranged to enter said socket, each shaft end having a recess which recesses register with each other, of a key located partly in each recess, and means for holding the key in place and compressing the surfaces of the projection of one shaft end into close contact with the corresponding surfaces of the socket on the other shaft end.

3. In a shaft coupling, the combination with two shafts placed end to end and having flanges, of a coupling-ring having an interior recess arranged to receive the flanges and provided with a tapered portion, and a holding-rin g fitting tightly over said tapered portion.

4. In a shaft -coupling, the combination with two shafts placed end to end and having flanges, of asegmental coupling-ring having an interior recess arranged to receive the flanges and provided with a tapered portion, and a holding-ring fitting over said tapered portion.

5. In a shaft -coupling, the combination with two shafts having flanges at the adjacent ends, each end having a recess, which recesses register to form a key-seat, of a key located name to this specification in the presence of in said seat, a coupling-ring encircling the two subscribing witnesses. flanges and the key and provided with a tapered portion, a holding-ring on said tapered 5 portion, and means for retaining the holding Witnesses:

ring in place. RUDOLPH FRIOKE,

In testimony whereof I have signed my OTTO DOEDERLEIN;

EMANUEL MULLER. 

